| 摘要 |
PROBLEM TO BE SOLVED: To polish an optical action surface in an optical system structural body with high accuracy and in a short time, and to make a polishing device itself compact. SOLUTION: A polishing unit 9 constituted of a rotary driving source 7 and a rotary polishing disc 4 mounted on the rotary shaft 3 is prepared. The rotary polishing disc 4 is constituted by forming an inclined reference polishing surface 4c inclined to the rotary shaft 3 by an angleθin a peripheral edge part in which an outer peripheral surface 4a and one side surface 4b are crossed. A polishing unit turning shaft AX which is orthogonally crossed with the inclined reference polishing surface 4c and is crossed with the rotary shaft 3 by the angleθis stipulated. A polishing point is determined by positioning an axial center of an object 1 to be polished on the polishing unit turning shaft AX. Relatively approaching the rotary polishing disc 4 and the object 1 to be polished at the polishing point and rotating the rotary polishing disc 4 at high speed around the rotary shaft 3, the polishing unit 9 and the object 1 to be polished are made to relatively perform turning operations around the polishing unit turning shaft AX to polish an end face of the object 1 to be polished.
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